Gregory Hall

Senior Chemist Emeritus

Chemistry Division
Building 555
Brookhaven National Laboratory
P.O. Box 5000
Upton, NY 11973-5000

Phone: (631) 344-4376
FAX:    (631) 344-5815
e-mail

Gas-Phase Molecular Dynamics

Research Interests

Chemical Physics: Molecular dynamics, spectroscopy, photochemistry and kinetics. Applications of high resolution spectroscopy to molecular dynamics; Doppler spectroscopy for the measurement of product correlations in bimolecular and unimolecular reactions. Statistical and dynamical models of vector correlations; experimental tests of unimolecular rate theory. Multiple surface reactions; coherent effects in multiple path reactions; measurement and interpretation of photofragment orientation. Collision-induced electronic transitions. Double-resonance spectroscopy for collision studies of energy and polarization transfer.

Education

A.B. in Chemistry, Cornell University, 1974
M.Sc. in Physical Chemistry, University of Toronto, 1976
Ph.D. in Physical Chemistry, University of Toronto, 1980

Professional Employment

Cornell University 1980-1987

• Manager, Facility for Laser Spectroscopy; Research Associate
• Senior Research Asssociate

Brookhaven National Laboratory 1987-present

• Assistant chemist, Associate Chemist, Chemist, Senior Chemist,
• Deputy Chair

Fellowships and Visiting Appointments

Max-Planck Institut für Strömungsforschung, Göttingen, summer 1986
Physical Chemistry Institute, University of Zürich, 9/1996-8/1997
Fellow of the American Physical Society, 2009
School of Chemistry, University of New South Wales, Sydney, 2/2015-4/2015
School of Chemical and Physical Sciences, Flinders University, Adelaide, 5/2015-7/2015

Representative Publications

• Collinear two-color saturation spectroscopy in CN A–X (1–0) and (2–0) bands
  D. Forthomme, C. P. McRaven, T.J. Sears and G.E. Hall
  J. Molec. Spectrosc. 296, 36-42 (2014)
  http://dx.doi.org/10.1016/j.jms.2013.12.006
• Temperature-dependent, nitrogen-perturbed line shape measurements in the ν₁+ν₃ band of acetylene using a diode laser referenced to a frequency comb
  M. J. Cich, D. Forthomme, C. P. McRaven, G. V. Lopez, G. E. Hall, T. J. Sears and A. W. Mantz
  J. Phys. Chem. A 117, 13908-13918 (2013) http://dx.doi.org/10.1021/jp408960e
• Argon-induced pressure broadening, shifting and narrowing in the CN A 2Π – X 2Σ+ (1-0) band.
  D. Forthomme, C. P. McRaven,  T. J. Sears  and G. E. Hall
  J. Phys. Chem. A 117, 11837-11846 (2013) http://dx.doi.org/10.1021/jp4030359
• Sub-Doppler spectroscopy of mixed state levels in CH₂
  C.-H. Chang, G. E. Hall and T. J. Sears
  J. Chem. Phys. 133, 144310 (2010)
• Sub-Doppler Stark Spectroscopy in the A-X (1,0) Band of CN
  M. L. Hause, G. E. Hall, and T. J. Sears
  J. Phys. Chem. A, 113, 13342–13346 (2009).
• Coherent and incoherent orientation and alignment of ICN photoproducts
  M. L. Costen and G. E. Hall
  Phys. Chem. Chem. Phys. 9, 272-287 (2007)
• State-resolved thermalization of singlet and mixed singlet-triplet states of CH₂
  A. V. Komissarov, A. Lin, T. J. Sears and G. E. Hall
  J Chem. Phys. 125, 084308 (2006)
• Transient Laser Frequency Modulation Spectroscopy
  G. E. Hall and S. W. North
  Annu. Rev. Phys. Chem. 51, 243-74 (2000)
• Vector Signatures of Adiabatic and Diabatic Dynamics in the Photodissociation of ICN
  M. L. Costen, S. W. North and G. E. Hall
  J. Chem. Phys. 111, 6735-49 (1999)
• Applications of Doppler spectroscopy in photofragmentation
  R. J. Gordon and G. E. Hall
  Adv. Chem. Phys. 96, 1-50 (1996)

Complete publication list